Concept: Use the entire alphabet on the keyboard as a unique attack / move.
Controls: Use the mouse to click where Wally walks, because WASD would not be possible. Arrow keys are free.
I would love to see this as a full game, although each one of the 26 different attacks would need some serious balancing and that takes a lot of time. I feel this would open the concept up for endless potential. Here's how I would flesh it out.
1* The biggest suggestion would be for obstacles / puzzles that require a certain attack or combination of attacks. For example, you could entertain, assclap, then terminate to spell "eat", which could be used to defeat a food-themed boss quicker.
2* Start with just 3-6 attacks to keep things simple for new players (for example, start with just Q, A, Z, W, S, and D), then the rest can be unlocked by progressing through the game. Paired with the first suggestion, this could be used with Metroidvania style exploration, where certain attacks are needed to remove roadblocks or to solve a more complicated word-themed puzzle that would've otherwise been impossible.
~frog~